IMPLEMENTS FOR EXTRACTING STUMPS. 



203 



This pole is fixed into the tree and then the other end is 

 placed on a grooved board and lifted from groove to groove by 

 two iron levers. In this way the tree is gradually pushed over, 



. 1 lo. Wohnmnn's machine. 



the action being most effective when the pole is at an angle of 

 about i.>> with the board. 



The gn>!il weight, about 5 cwt., of this machine has pre- 



I-'J.LT. 141. Screw-jack. 



vented its coming into general use, but Draudt has constructed 

 one of only half that weight, and Laubenheimer has substi- 

 tuted for the grooved plank an endless iron screw, on which a 



